Acetic acid, tib cov organic acid uas muab cov kua txiv hmab txiv ntoo tom, ua rau muaj kev txhoj puab heev ntawm qhov kub thiab txias, o thiab yaj ntau cov elastomer gaskets. Xaiv qhov tseeb gasket rau PTFE exchanger nyob rau hauv qhov kev pab no yog ib qho kev txiav txim siab ntawm zoo heev compatibility thiab meej meej. Nyob rau hauv corrosive tshav kub hloov tshuab, sealing kev ua tau zoo feem ntau tswj tsawg dua los ntawm exchanger tsim thiab ntau dua los ntawm cov tshuaj resilience ntawm ib tug nyias, compressed interface.
Vim li no,gasket khoom kub acetic acid PTFE exchangerkev xaiv tau raug kho raws li qhov tseem ceeb ntawm cov qauv tsim tsis yog cov ntsiab lus me me.
Chemical Ib puag ncig hauv Acetic Acid Thaum tshav kub kub Exchanger
Kev pabcuam kub acetic acid feem ntau tshwm hauv:
Organic synthesis units
Cov txheej txheem Esterification
Solvent rov qab systems
Chemical concentration thiab distillation loops
Kub nquag mus los yog siab dua 100 degree, thaum cov concentrations yuav txawv ntawm dilute aqueous daws mus rau ze rau -glacial acetic acid.
Ntawm qhov kub siab, acetic acid ua rau muaj kev txhoj puab heev rau elastomers, ua kom nrawm nrawm, o, thiab ntev - lub sij hawm degradation.
EPDM ua tus Thawj Coj Gasket Candidate
EPDM (ethylene propylene diene monomer) roj hmab yog dav siv nyob rau hauv acidic aqueous ib puag ncig vim nws cov profile zoo heev.
Kev ua tau zoo ntawm EPDM
EPDM yog tsim rau acetic acid daim ntaub ntawv nyob rau hauv kev tswj tej yam kev mob:
Tau tshaj acetic acid concentrations txog li 50%
Txhim khu kev ua tau zoo txog li 100 degree
Zoo elasticity rau qis bolt -load sealing
Tus nqi -zoo rau cov flange loj
Tsis pub dhau PTFE cov khoom sib txuas sib txuas, EPDM feem ntau muab cov tshuaj sib npaug rau kev ua haujlwm nruab nrab.
Lub PTFE gasket yog ib qho tshuaj tiv thaiv, thaum EPDM yog qhov zoo heev, tshwj xeeb saib xyuas tau zoo rau cov kev pabcuam tshwj xeeb.
Kev txwv ntawm EPDM
Txawm hais tias muaj zog acid tsis kam, EPDM muaj kev txwv:
Tsis zoo rau cov roj, roj, thiab hydrocarbons
Kev pheej hmoo degradation hauv cov kwj tshuaj sib xyaw
Txo qhov tsim nyog ntawm qhov kub thiab txias siab tshaj qhov kev txwv tsim
Yog hais tias cov txheej txheem chemistry suav nrog kev sib kis los yog hnyav crossover, cov ntaub ntawv sib raug zoo yuav tsum tau rov ntsuas dua.
PTFE Lub hnab ntawv Gaskets rau Kev Pabcuam hnyav
Thaum cov kev ua haujlwm ua haujlwm dhau EPDM lub hnab ntawv nyab xeeb, PTFE-raws li cov tshuab sealing yog qhov kev daws teeb meem zoo tshaj plaws.
Cov qauv ntawm PTFE lub hnab ntawv Gaskets
Lub hnab ntawv PTFE gasket muaj xws li:
Ib qho tshuaj inert PTFE txheej tawv nqaij
Ib tug compressible core (piv txwv li, aramid fiber los yog corrugated stainless hlau)
Cov qauv no hybrid sib xyaw ua ke tshuaj tiv thaiv nrog kev ua raws li cov neeg kho tshuab.
Qhov zoo hauv Kev Pabcuam Kub Acetic Acid
Hauv cov mob hnyav, PTFE lub hnab ntawv gaskets muab:
Universal tshuaj tiv thaiv nyob rau hauv acid concentrations
Kev ruaj ntseg ntawm qhov kub siab tshaj 100 degree
Kev tiv thaiv rau cov tshuaj sib xyaw ua ke
Ntev -lub sij hawm sealing kev cia siab rau hauv ib puag ncig nruj
Vim hais tias PTFE yog tshuaj inert rau acetic acid, lub sealing interface tseem unaffected txawm nyob rau hauv fluctuating kev khiav hauj lwm tej yam kev mob.
Kev xav txog kev teeb tsa
PTFE hnab ntawv gaskets yuav tsum tau ceev faj txhua yam tuav:
Tswj bolt torque yog qhov tseem ceeb
Tshaj - compression yuav tsum zam kom tsis txhob muaj dej txias
Flange nto tiav yuav tsum tsim nyog rau sealing stability
Thaum txhim kho kom zoo, PTFE systems muab qhov kev nyab xeeb siab tshaj plaws hauv kev pabcuam corrosive exchanger.
Kev xaiv cov khoom siv rau PTFE Exchangers
Nyob rau hauv PTFE tshav kub exchanger tsim, xaiv gasket yog ze ze rau cov txheej txheem hnyav.
Kev xaiv raws li txheej txheem txheej txheem
Me me mus rau nruab nrab acetic acid (<50%, ≤100°C): EPDM is typically sufficient
High concentration or elevated temperature (>100 degree): PTFE hnab ntawv nyiam
Cov tshuaj sib xyaw ua ke los yog tsis paub meej muaj pes tsawg leeg: PTFE xaiv raws li kev xaiv muaj kev nyab xeeb
Cov txheej txheem txheej txheem no txo qhov kev pheej hmoo ntawm kev foob ua ntej ntxov thiab tsis tau npaj tseg.
Mechanical thiab Thermal Considerations
Sealing kev ua tau zoo yog cuam tshuam tsis yog los ntawm kev sib raug zoo ntawm cov tshuaj lom neeg, tab sis kuj yog los ntawm kev coj tus cwj pwm hauv thermal cycling.
EPDM Tus Cwj Pwm
High elasticity txhawb txhim khu kev qha sealing nyob rau hauv nruab nrab loads
Compression rov qab yog feem ntau zoo
Ntev -lub sij hawm ruaj khov yog txo qis ntawm qhov kub siab nyob ze qhov kev txwv tsim
PTFE hnab ntawv cwj pwm
Zoo heev tshuaj stability
Lower elasticity xav tau ntau dua installation precision
Txaus siab rau cov dej txias hauv qab kev ntxhov siab heev
Ob qho khoom siv yuav tsum raug tsim flange thiab tswj cov txheej txheem sib dhos kom ua tiav kev sib khi ruaj khov.
Kev tswj hwm kev pheej hmoo hauv cov txheej txheem sib xyaw
Hauv kev lag luam tiag tiag, acetic acid yuav tsis muaj nyob hauv kev sib cais.
Qhov tseem ceeb ntawm cov tshuaj tsis meej
Yog tias cov txheej txheem kwj muaj:
Organic kuab tshuaj
Roj los yog roj
Catalyst residues
Hloov pauv acid concentration
EPDM kev sib raug zoo tuaj yeem ua tsis tau. Nyob rau hauv xws li mob, PTFE hnab ntawv gaskets nyiam vim lawv universal inertness.
Xaus
Kev xaiv cov ntaub ntawv sib khi rau cov kev pabcuam kub acetic acid hauv PTFE exchanger suav nrog kev ntsuas kev ua tau zoo, tus nqi, thiab cov tshuaj muaj tseeb. EPDM muab cov kev daws teeb meem txhim khu kev qha thiab kev lag luam rau nruab nrab qhov kub thiab txias, thaum PTFE lub hnab ntawv gaskets xa cov kev sib khi thoob ntiaj teb rau kev mob hnyav lossis tsis meej.
Qhov kev txiav txim zaum kawg hauvgasket khoom kub acetic acid PTFE exchangerCov ntawv thov raug tswj hwm los ntawm kev ua phem ntawm cov tshuaj ib puag ncig thiab qhov yuav tsum tau muaj kev nyab xeeb. Lub foob sawv cev rau lub cev me tshaj plaws nyob rau hauv lub exchanger, tab sis nws ua hauj lwm raws li ib tug ntawm cov tseem ceeb tshaj plaws kev tiv thaiv kev ruaj ntseg system thiab kev ua hauj lwm txuas ntxiv mus.
